40978165 has 8 divisors (see below), whose sum is σ = 49209048. Its totient is φ = 32759040.

The previous prime is 40978159. The next prime is 40978199. The reversal of 40978165 is 56187904.

It can be written as a sum of positive squares in 4 ways, for example, as 3118756 + 37859409 = 1766^2 + 6153^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40978165 - 2¹⁵ = 40945397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9609 + ... + 13201.

It is an arithmetic number, because the mean of its divisors is an integer number (6151131).

Almost surely, 2^40978165 is an apocalyptic number.

It is an amenable number.

40978165 is a deficient number, since it is larger than the sum of its proper divisors (8230883).

40978165 is a wasteful number, since it uses less digits than its factorization.

40978165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5879.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 40978165 is about 6401.4189833192. The cubic root of 40978165 is about 344.7605003039.

The spelling of 40978165 in words is "forty million, nine hundred seventy-eight thousand, one hundred sixty-five".